(China (Mainland))
Product Summary
The SN74HCT139DR is a dual 2-line to 4-line decoder/demultiplexer. The SN74HCT139DR is designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, the SN74HCT139DR can minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay time of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.
Parametrics
SN74HCT139DR absolute maximum ratings: (1)Supply voltage range, VCC:-0.5 V to 7 V; (2)Input clamp current, IIK (VI＜0 or VI＞VCC): ±20 mA; (3)Output clamp current, IOK (VO＜0 or VO＞ VCC): ±20 mA; (4)Continuous output current, IO (VO = 0 to VCC): ±25 mA; (5)Continuous current through VCC or GND: ±50 mA; (6)Package thermal impedance, θJA: DB package: 82℃/W, D package: 73℃/W, N package: 67℃/W, PW package: 108℃/W; (7)Storage temperature range, Tstg: -65℃ to 150℃.
Features
SN74HCT139DR features: (1)Operating Voltage Range of 4.5 V to 5.5 V; (2)Outputs Can Drive Up To 10 LSTTL Loads; (3)Low Power Consumption, 80-μA Max ICC; (4)Typical tpd = 10 ns; (5)±4-mA Output Drive at 5 V; (6)Low Input Current of 1 μA Max; (7)Inputs Are TTL-Voltage Compatible; (8)Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems; (9)Incorporate Two Enable Inputs to Simplify Cascading and/or Data Reception.
Diagrams
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 SN74HCT139DR |
Texas Instruments |
Encoders, Decoders, Multiplexers & Demultiplexers Dual 2 to 4-Line Decdr/Demltplxer |
Data Sheet |
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SN74HCT139DRE4 |
Texas Instruments |
Encoders, Decoders, Multiplexers & Demultiplexers Dual 2 to 4-Line Decdr/Demltplxer |
Data Sheet |
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SN74HCT139DRG4 |
Texas Instruments |
Encoders, Decoders, Multiplexers & Demultiplexers Dual 2Ln To 4Ln Decoder Demultiplexr |
Data Sheet |
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